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20200120202 = 215764331593
BaseRepresentation
bin10010110100000001…
…010101111110001010
31221010210002102120002
4102310001111332022
5312332212321302
613140234403002
71313402121503
oct226401257612
957123072502
1020200120202
118626494319
123ab8b90462
131b9bca4862
14d98ad9baa
157d35eac02
hex4b4055f8a

20200120202 has 8 divisors (see below), whose sum is σ = 30493175556. Its totient is φ = 10035728352.

The previous prime is 20200120169. The next prime is 20200120207. The reversal of 20200120202 is 20202100202.

It can be written as a sum of positive squares in 2 ways, for example, as 20195536321 + 4583881 = 142111^2 + 2141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20200120207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32165483 + ... + 32166110.

Almost surely, 220200120202 is an apocalyptic number.

20200120202 is a deficient number, since it is larger than the sum of its proper divisors (10293055354).

20200120202 is a wasteful number, since it uses less digits than its factorization.

20200120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64331752.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20200120202 its reverse (20202100202), we get a palindrome (40402220404).

The spelling of 20200120202 in words is "twenty billion, two hundred million, one hundred twenty thousand, two hundred two".

Divisors: 1 2 157 314 64331593 128663186 10100060101 20200120202